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<p><strong><code>unicode</code></strong> 属性表明正则表达式带有"<code>u</code>" 标志。 <code>unicode</code> 是正则表达式独立实例的只读属性。</p>
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<th class="header" colspan="2"><code>RegExp.prototype.unicode</code> 属性的属性特性：</th>
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<td>writable</td>
<td>false</td>
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<td>enumerable</td>
<td>false</td>
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<td>configurable</td>
<td>true</td>
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<h2 id="描述">描述</h2>
<p><code>unicode</code> 的值是 <a href="Reference/Boolean" title="此页面仍未被本地化, 期待您的翻译!"><code>Boolean</code></a>，并且如果使用了 "<code>u</code>" 标志则为 <code>true</code>；否则为 <code>false</code>。"<code>u</code>" 标志开启了多种 Unicode 相关的特性。使用 "u" 标志，任何 Unicode 代码点的转义都会被解释。</p>
<p>你不能直接修改这个属性，它是只读的。</p>
<h2 id="示例">示例</h2>
<h3 id="使用_unicode_属性">使用 <code>unicode</code> 属性</h3>
<pre><code  class="language-javascript">var regex = new RegExp('\u{61}', 'u');

console.log(regex.unicode); // true
</code></pre>
<h2 id="规范">规范</h2>
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<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
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<td><a class="external" href="https://www.ecma-international.org/ecma-262/6.0/#sec-get-regexp.prototype.unicode" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">RegExp.prototype.unicode</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td>初始定义。</td>
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<td><a class="external" href="https://tc39.github.io/ecma262/#sec-get-regexp.prototype.unicode" hreflang="en" lang="en" rel="noopener">ECMAScript Latest Draft (ECMA-262)<br/><small lang="zh-CN">RegExp.prototype.unicode</small></a></td>
<td><span class="spec-Draft">Draft</span></td>
<td> </td>
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<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div><div class="blockIndicator warning"><strong><a class="external" href="https://github.com/mdn/browser-compat-data" rel="noopener">We're converting our compatibility data into a machine-readable JSON format</a></strong>.
            This compatibility table still uses the old format,
            because we haven't yet converted the data it contains.
            <strong><a class="new" href="/zh-CN/docs/MDN/Contribute/Structures/Compatibility_tables" rel="nofollow">Find out how you can help!</a></strong></div>
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<a id="AutoCompatibilityTable" name="AutoCompatibilityTable"></a>
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<li class="selected"><a>Desktop</a></li>
<li><a>Mobile</a></li>
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<th>Feature</th>
<th>Chrome</th>
<th>Edge</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
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<td>Basic support</td>
<td>50</td>
<td>12 (case folding 13)</td>
<td><a href="/en-US/Firefox/Releases/46" title="Released on 2016-04-26.">46</a> (46)</td>
<td><span style="color: #f00;">未实现</span></td>
<td>37</td>
<td>10</td>
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<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
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<td>Basic support</td>
<td><span style="color: #f00;">未实现</span></td>
<td>50</td>
<td>46.0 (46)</td>
<td><span style="color: #f00;">未实现</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td>10</td>
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<h2 id="另见">另见</h2>
<ul>
<li><a href="Reference/Global_Objects/RegExp/lastIndex" title="lastIndex 是正则表达式的一个可读可写的整型属性，用来指定下一次匹配的起始索引。"><code>RegExp.lastIndex</code></a></li>
<li><a href="Reference/Global_Objects/RegExp/global" title='global 属性表明正则表达式是否使用了 "g" 标志。global 是一个正则表达式实例的只读属性。'><code>RegExp.prototype.global</code></a></li>
<li><a href="Reference/Global_Objects/RegExp/ignoreCase" title='ignoreCase 属性表明正则表达式是否使用了 "i" 标志。ignoreCase 是正则表达式实例的只读属性。'><code>RegExp.prototype.ignoreCase</code></a></li>
<li><a href="Reference/Global_Objects/RegExp/multiline" title='multiline 属性表明正则表达式是否使用了 "m" 标志。multiline 是正则表达式实例的一个只读属性。'><code>RegExp.prototype.multiline</code></a></li>
<li><a href="Reference/Global_Objects/RegExp/source" title="source 属性返回一个值为当前正则表达式对象的模式文本的字符串，该字符串不会包含正则字面量两边的斜杠以及任何的标志字符。"><code>RegExp.prototype.source</code></a></li>
<li><a href="Reference/Global_Objects/RegExp/sticky" title="sticky 属性反映了搜索是否具有粘性（ 仅从正则表达式的 lastIndex 属性表示的索引处搜索 ）。sticky 是正则表达式对象的只读属性。"><code>RegExp.prototype.sticky</code></a></li>
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